Diff: Track.cpp

Revision:

20:32ba0a5f2d02

Child:

21:31647d80614f

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Track.cpp	Mon Jun 11 14:50:15 2018 +0000
@@ -0,0 +1,89 @@
+#include "Track.h"
+#include <iostream>
+
+Track::Track () : trackpin(p20), lcd(p22, p21, p23, p24, p25, p26), myled1(LED1)
+{
+    //ctor
+    address = 0;
+    inst = 0;
+    myled1 = 1;
+}
+
+Track::~Track()
+{
+    //dtor
+}
+
+void Track::DCC_send_command(int repeat_count)
+{
+    unsigned __int64 command = 0x0000000000000000; // __int64 is the 64-bit integer type
+    unsigned __int64 temp_command = 0x0000000000000000;
+    unsigned __int64 prefix = 0x3FFF; // 14 "1" bits needed at start
+    unsigned int error = 0x00; //error byte
+    //calculate error detection byte with xor
+    error = address ^ inst;
+    //combine packet bits in basic DCC format
+    command = (prefix<<28)|(address<<19)|(inst<<10)|((error)<<1)|0x01;
+    //printf("\n\r %llx \n\r",command);
+    int i=0;
+//repeat DCC command lots of times
+    while(i < repeat_count) {
+        temp_command = command;
+//loops through packet bits encoding and sending out digital pulses for a DCC command
+        for (int j=0; j<64; j++) {
+            if((temp_command&0x8000000000000000)==0) { //test packet bit
+                //send data for a "0" bit
+                trackpin=0;
+                wait_us(100);
+                trackpin=1;
+                wait_us(100);
+            } else {
+                //send data for a "1"bit
+                trackpin=0;
+                wait_us(58);
+                trackpin=1;
+                wait_us(58);
+            }
+            // next bit in packet
+            temp_command = temp_command<<1;
+        }
+        i++;
+    }
+}
+
+void Track::DCC_send_command(unsigned int address, unsigned int inst, unsigned int repeat_count)
+{
+    unsigned __int64 command = 0x0000000000000000; // __int64 is the 64-bit integer type
+    unsigned __int64 temp_command = 0x0000000000000000;
+    unsigned __int64 prefix = 0x3FFF; // 14 "1" bits needed at start
+    unsigned int error = 0x00; //error byte
+    //calculate error detection byte with xor
+    error = address ^ inst;
+    //combine packet bits in basic DCC format
+    command = (prefix<<28)|(address<<19)|(inst<<10)|((error)<<1)|0x01;
+    //printf("\n\r %llx \n\r",command);
+    int i=0;
+//repeat DCC command lots of times
+    while(i < repeat_count) {
+        temp_command = command;
+//loops through packet bits encoding and sending out digital pulses for a DCC command
+        for (int j=0; j<64; j++) {
+            if((temp_command&0x8000000000000000)==0) { //test packet bit
+                //send data for a "0" bit
+                trackpin=0;
+                wait_us(100);
+                trackpin=1;
+                wait_us(100);
+            } else {
+                //send data for a "1"bit
+                trackpin=0;
+                wait_us(58);
+                trackpin=1;
+                wait_us(58);
+            }
+            // next bit in packet
+            temp_command = temp_command<<1;
+        }
+        i++;
+    }
+}
\ No newline at end of file